.app{
    width: 100%;
    height: 500px;
    display: flex;
    justify-content: space-between;
}
.left{
    width: 25%;
    height: 100%;
    display: flex;
    flex-direction: column;
}
.title{
    height: 10%;
    width: 100%;
    font-size: 23px;
    font-weight: bold;
    padding: 0 10px;
    color: #555;
}
.bookhead{
    height: 90%;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}
.head_url{
    width: 100%;
    height: 100%;
}
.img_url{
    width: 70%;
    height: 60%;
    margin: 0 auto;
    overflow: hidden;
    border-radius: 10px;
    z-index: 3;
}
.img{
    width: 100%;
    height: 100%;
    border-radius: 10px;
    transition: all 0.5s;
}
.img:hover{
    transform: scale(1.15);
    cursor: pointer;
}
.head_info{
    width: 60%;
    margin: 0 auto;
    height: 40%;
}
.back{
    width: 100%;
    height: 80%;
    position: absolute;
    bottom: 0;
    left: 0;
    z-index:-1;
    border-radius: 10px;
    background: linear-gradient(180deg,#e3e9ed,#fff 58%)
}
.txt{
    width: 100%;
    font-size: 18px;
    text-align: center;
    padding: 5px 0;
}
.txt:hover{
    color:#e60000;
    cursor: pointer;
}
.sub_txt{
    font-size: 14px;
    color: #555;
    padding: 5px 0;
}
.mid{
    width: 50%;
    height: 100%;
    display: flex;
    flex-direction: column;
}
.mid_books{
    width: 100%;
    height: 90%;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    padding: 0 20px;

}
.mid_book{
    width: 50%;
    display: flex;
    margin-top: 20px;
    overflow: hidden;
    border-radius: 8px;
}
.mid_left{
    width: 60%;
    height: 85%;
}
.mid_left img{
    width: 100%;
    height: 100%;
    border-radius: 8px;
    transition: all 0.5s;
}
.mid_left img:hover{
    transform: scale(1.15);
    cursor: pointer;
}
.mid_right{
    padding: 0 10px;
    display: flex;
    flex-direction: column;
}
.mid_info{
    height: 70%;
    font-size: 13px;
}
.mid_book_name:hover{
    color: #e60000;
    cursor: pointer;
}
.mid_book_sub:hover{
    color: #e60000;
    cursor: pointer;
}
.mid_txt:hover{
    color: #e60000;
    cursor: pointer;
}
.mid_book_name{
    font-size: 15px;
}
.mid_book_sub{
    color: #555;
}
.right{
    width: 25%;
    height: 95%;
    padding-left: 20px;
}
.mid_txt{
    font-size: 13px;
    color: #555;
}
.rank{
    width: 100%;
    height: 90%;
    padding: 10px 0;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    background: linear-gradient(180deg,#e3e9ed,#fff 58%);
    border-radius: 10px;
}
.rank_item{
    width: 90%;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
}
.rank_num{
    width: 20%;
}